Accordion not working within enfold pages

Hi, our previous marketing company built our website for us using your theme, http://www.coolcaraircon.co.uk but noticed now that the accordion content element no longer works. Example page is http://www.coolcaraircon.co.uk/contact-us/solihull/.

I registered this issue as a pre-sale and advised it’s probably caused by my theme being out of date. Seeing as the company who built the site no longer exist I’ve thought it easier to buy the theme which I’ve no done but not installed it. I gather installing it will fix the issue as I’m running version 3.0.4 it seems but I’m not at all technical and know if i install/update it something else will go wrong or stop working so are you able to help?

I see you do an installation service for $50 but I don’t need it installing, just updating. Hopefully this will fix the issue and not cause others so can you help and advise the best way forward? I’m happy of course to pay for your service to rectify the issue so maybe we can come to some sort of agreement on cost to update the theme, and fix any issues that arise, and possibly check for any performance issues which i see you also do?